I do not know that you want to remove that, where exactly is it located on the mobo? Can you give a wider angle (more of the subject)? If it is what I am thinking, I can help but I want to be sure.
well it's located in a "hole", on the edges of the motherboard, all other holes have philips + screws in them but this one has this plastic crap thing, It's a plastic needle with extra plastic on a side, kind of looks like this
and that extra plastic i think makes it hard to remove, but then again I'm pretty careful around the motherboard and if something doesn't come out gently I don't pull it out with all my strength like a gorilla